night blindness-vitamin A deficiency
color blindness - trouble distinguishing colors
hyperopia-eyeball too short
myopia-eyeball too long
astigmatism-light refracted aspherically.
<h3><u>Explanation:</u></h3>
Night blindness is defined as the disease which involves the mal production of retinol in the rod cells of retina. This leads to the decreased sensitivity of eye to dim light.
Similarly, colour blindness is a genetic disease which is characterised by absence of a particular pigment in cone cells. This restricts the vision of a particular colour.
Hyperopia or hypermetropia is the shortening of eyeball which leads to the focusing of light rays behind the retina. So convex lenses are required to focus them on retina.
Myopia is the opposite of hypermetropia where the eyeball is elongated and the light rays doesn't reach the retina. So concave lens are required to focus the rays on retina.
Astigmatism is the case where the curvature of lens isn't correct, and the lens required for the correction is cylindrical lens
The hummingbird's nutritional needs daily are 10,000 mg of sugar and 8,000 mg of protein.
Since one nasturtium flower provides 10 mg of sugar and 10 mg of protein, the hummingbird needs 1000 nasturtium flowers each day for its nutritional needs (10,000/10 = 1000).
Since one honeysuckle flower provides 20 mg of sugar and 10 mg of protein, the hummingbird needs 500 honeysuckle flowers each day for its nutritional needs.
If the hummingbird feeds only on nasturtium flowers, then the bird will need 5,000 seconds to get exactly the food it needs. This is calculated based on the information that it takes 5 seconds to feed on a nasturtium: 1000 flowers daily * 5 seconds = 5000 sec = 83,3 min.
If the hummingbird feeds only on honeysuckle flowers, then the bird will need: 500 flowers * 20 seconds = 10,000 sec = 166,6 min.
Answer:
A
Explanation:
Cells in the leaves of plants contain specialized structures called chloroplasts.
Answer:
O Add a drop of water onto a specimen, and
place a cover slip on top
Надеюсь это поможет
Answer:
its obviously b or c but im almost positive c....